Yay off-topic tangent time!
Which study are you talking about? Or are you just talking in general terms? 'Cause there's a specific one that popular media usually cites for the claim that 'experts can't tell apart white wine and red wine'.
Err...are you talking about the
2001 Morrot, Brochet, Dubourdieu experiment? It's one of the only ones directly on this topic. That experiment merely showed that the visual color overwhelmingly affected perceptions of the odor of wine, and that traditional descriptors of white and red wine odors were inaccurate at distinguishing between the two.
First, 54 oenology students were given a glass of white wine and a glass of red wine. The students, asked to describe the odor of each, gave traditionally white wine flavor descriptors to the white wine and traditionally red wine flavor descriptors to the red wine. Pretty straightforward.
The following week, the students were given a glass of white wine and a glass of white wine dyed red. The students, asked to describe the odor of each, gave traditionally white wine descriptors to the white wine and traditionally red wine flavor descriptors to the white wine dyed red.
And that's all. While the paper itself was pretty darn cool and had huge implications for wine-tasting, it's been generalized and exaggerated to hell in popular media.